. The Bell System technical journal . nd duration at a repetition rate of about 1000 pulses persecond. With suitable values of the operating parameters, the magnetron 170 BELL SYSTEM TECHNICAL JOURNAL oscillates as a self excited oscillator whenever the DC voltage is energy available at the output circuit may be connected, as in a radarset, to an antenna or, as in a laboratory experimental setup, may be absorbedin a column of water. Analogy to Other Oscillators: In its fundamental aspects, the mag-netron oscillator is not unlike other and perhaps more familiar pa
. The Bell System technical journal . nd duration at a repetition rate of about 1000 pulses persecond. With suitable values of the operating parameters, the magnetron 170 BELL SYSTEM TECHNICAL JOURNAL oscillates as a self excited oscillator whenever the DC voltage is energy available at the output circuit may be connected, as in a radarset, to an antenna or, as in a laboratory experimental setup, may be absorbedin a column of water. Analogy to Other Oscillators: In its fundamental aspects, the mag-netron oscillator is not unlike other and perhaps more familiar particular, instructive analogies may be drawn between the magnetronoscillator, the velocity variation oscillator, and the simple triode Fig. 2 is depicted schematically the parallelisms between these types ofoscillators and a simplified equivalent lumped constant circuit. In the triode of Fig. 2(a), as in the gap of the second cavity of the velocityvariation tube of Fig. 2(b) and in the interaction space of the magnetron. Fig. 1.—A schematic diagram designed to show the principal component parts of acentimeter wave magnetron oscillator. The resonator system and output circuit eachrepresents one of several types used in magnetron construction. oscillator of Fig. 2(c), electrons are driven against RF fields set up by theresonator or tank circuit, to which they give up energy absorbed from theprimary DC source. In each type of oscillator there is operative a mecha-nism of bunching which allows electrons to interact with the RF fieldprimarily when the interaction will result in energy transfer to the RF the triode oscillator this is accomplished by the grid, whose RF potentialis supplied by the tank circuit in proper phase with respect to the RFpotential on the anode. In the velocity variation oscillator, bunching isaccomplished by variation of the electron velocities in the gap oi the firstcavity, followed by drift through the intervening space to the secon
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
